Remove nss_util.h dependency from FakeCryptohomeClient.

Remove nss_util.h dependency from FakeCryptohomeClient.

Also removes the unused tpm_token_name_ member from TPMTokenLoader.

BUG=NONE
R=stevenjb@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=284641

[pneubeck (no reviews), 2014-07-21 13:18:50]

ptal

The important thing is the removed dependency on that constant in nss_util.h,
because I will remove it there as well.
And actually, there is currently no user of the TPM token name anyways. We could
actually remove it from the Cryptohome callbacks as well.

[stevenjb, 2014-07-21 16:43:38]

lgtm

[pneubeck (no reviews), 2014-07-21 16:53:36]

The CQ bit was checked by pneubeck@chromium.org

[commit-bot: I haz the power, 2014-07-21 16:53:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/pneubeck@chromium.org/408853004/1

[commit-bot: I haz the power, 2014-07-21 20:02:33]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)

[commit-bot: I haz the power, 2014-07-21 21:15:45]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-07-21 21:15:46]

Try jobs failed on following builders:
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)

[pneubeck (no reviews), 2014-07-22 07:18:47]

Committed patchset #1 manually as r284641 (presubmit successful).